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Questions about imagery devices on spacecraft and probes.

13 votes
4 answers
5k views

Why does the Curiosity rover camera image resolution have "milliradians" as a unit?

NASA's published specs for the Curiosity rover cameras says that the image resolution is in milliradians per pixel. Which is odd because image resolution is measured in physical size units, i.e. milli …
spaceamoeba1010's user avatar
20 votes
3 answers
5k views

Why do the boot prints on the moon appear bright in some photographs or film?

I've seen that in some videos or photos of the moon mission, the boot prints appear brighter relative to the untouched ground: But in some other cases, they are the same brightness as the ground: …
spaceamoeba1010's user avatar